Circuit for short circuit detection through resistive shunt in p

Details Circuit for short circuit detection through resistive shunt in p Circuit for short circuit detection through resistive shunt in p

1997-01-27

1998-06-09

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

361 93, 361100, 361115, H02H 300

Patent

active

057644667

ABSTRACT:
A power circuit includes a high-side transistor, a low-side transistor and a current sensing resistor in series connection as well as a threshold detection circuit for turning off the transistors when the current in the current sensing resistor exceeds a predetermined level. The circuit further includes a driver circuit for providing a bias voltage to the low-side transistor and a voltage storing device, such as a capacitor, coupled from the low-side transistor to the driver circuit to maintain the bias voltage at a sufficient magnitude to momentarily keep the low-side transistor on during a fault condition.

REFERENCES:
patent: 4070701 (1978-01-01), Harnden, Jr.
patent: 4275313 (1981-06-01), Boll et al.
patent: 4709161 (1987-11-01), Mizohata

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